Celebrating 40 Years of Skill and Passion.
For his 40 years ruby anniversary at Marantz, Ken Ishiwata and his daring team crafted these two audiophile gemstones with hand-selected and custom-made components to carry all the emotions of music. The KI Ruby Series is precision-made and virtuously tuned to deliver the most enjoyable sound to amplify your senses.
• Collector‘s item
• Individually numbered
• Limited to 1.000 sets
The PM-KI Ruby at a glance.
Engineered and extensively tuned by a team led by Ken Ishiwata, drawing on more than 65 years of Marantz amplifier design knowledge
Marantz high-resolution preamplifier stage using proprietary HDAM technology
Switching power amplifier design derived from flagship PM-10 amplifier
Generous output: 100W + 100W (8 ohm), 200W + 200W (4 ohm)
Fully-discrete two-stage design for signal purity, with separate power supplies for preamp and power amplifier sections to reduce interference
Toroidal transformer dedicated to preamp for clarity and precision sound
Dedicated headphone amplifier with alldiscrete construction featuring HDAM-SA2
Linear volume control with new electric volume system
Laser-engraved ‘Ken Ishiwata’ signature and Ruby motif, marking Ken Ishiwata’s 40 years with Marantz